Railroad-car spring



D. B. ROGERS.

Patented Feb. 23. 1858.

0 0 n n p S r a C W 'ZZ $565 UNITED STATES PATENT OFFICE.

DAVID B. ROGERS, OF PITTSBURGH, PENNSYLVANIA.

RAILROAD-GAR SPRING.

Specification forming part of Letters Pat ent No. 19,448, dated February23, 1858; Reissued July 26,

T 0 all whom it may concern:

Be it known that I, DAVID B. ROGERS, of the city of Pittsburgh andcounty of Allegheny, in the State of Pennsylvania, have invented a newand Improved Mode of Constructing Springs for Cars and other Purposes;and I do hereby declare that the following is a full and exactdescription thereof, reference being had to the accompanying drawingsand to the letters of reference marked thereon.

The nature of my invention consists of forming springs from thin plateor sheet steel in such a. manner as to obtain a central equilibrium andreverse crossways and corner bearing.

To enable others skilled in the art to make and use my invention I willproceed to describe its construction and operation.

No. 1 is a representation of several views of the corner bearings. N0. 2is a representation of the reverse crossways bearings.

Figure 1 N0. 1 is two leaves of square form bearing cornerwise-sideview. In forming this spring I take a square plate of steel, and make ahole in the center, so as to allow the plate to vibrate on the stake G,as the spring rests on the lower bolsterH, the upper bolster H havingholes also corresponding with those in the spring, so as to play looselyin'the stake G which is made fast to the lower bolster by screw and nutor otherwise. Then I bend two of the opposite corners in one directionas seen at A, at the left hand upper corner of Fig. 1 also at the righthand at the letter A. Then I bend the other corners in the oppositedirection as seen at, B, B (this form of bend being antagonistic createsan equilibrium in the center and adds strength to the spring). These areriveted together or otherwise made fast so as not to slide off from eachother as is represented at the letters B, B, Fig. 2, the lower cornersat C, C, Fig. 1 forming the bearings below as set on the left hand endupon the top of Fig. 4.

Fig. 2 No. 1 is a corner view of the two leaves together with the endview of the bolster H, H. Fig. 3 No. 1 is also a corner view of twoleaves together with a side view of the bolster H, H, upon which itrests.

Fig. 4 is a side view of a spring composed of four leaves containingthree squares each placed one above the other and bearing upon eachother, being placed between the bolster H, H, with an edgewise view ofeach-leaf as they are put upon the stake G. In making this spring-I takea plate of steel two or more times the length of its width, then I makea hole in each of the end squares so as to slide on the stake G, see D,D, as shown in the single square, I then bend the corners of one end inopposite direction see E, E, then at the distance of one square from theend, I bend the edges of the plate in opposite directions from thecorners and also from each other see F, F, Gr, G, then at the distanceof another square, I bend the same edge of the leaf in an oppositedirection from the last and so on any number of squares I choose, thusforming a continuous succession of springs bearing precisely as if theywere cut apart and each square has its equilibrium exactly the same asif single.

No. 2, Fig. 1, is one leaf with a top view of a spring so formed as toobtain a reverse crosswise hearing. In making this spring I take a plateof steel three, or more times the length of its width I then make holesas in N0. 1 to receive the stake G also small holes at the corners forriveting it to its mate,

I then bend one square convex and next square concave, the next convexand the next concave, and so on as many squares as there is in theplate, as shown at the letters I, J, K, thus forming a spring ofcrosswise bearing by which I obtain an equilibrium as in No.1, exceptthat in No. 1 the effect is in the center of the square, but in thiscase it is between the squares.

Fig. 2 is a succession of leaves riveted together with convex to convexand concave to concave alternately through the squares (see letters 0 Ofor convex and P P for concave) presenting a side view of the spring asarranged between the bolsters H, H, with the edge view of the leavesshowing at the letters R R the change from convex to concave &c.

I do not claim the so bending of a plate or a number of plates, so as toform leaves of such shape that when placed one above the other, that thehighest and lowest points of one leaf, shall be in contact with thelowest and-highest points respectively of the next adjacent leaf-asrecently patented.

Having described my invention what I claim as my improvement and desireto secure by Letters Patent, is-

1. The forming a spring of a square plate bearings Which is obtained acentral of thin steel, 'bybendlng the four corners equilibrium in orbetween a succession of in one direction, or two corners in onedirecsquares as substantially described.

tion and the other two in an opposite direc- I 1 DAVID B. ROGERS.

5 tion as described. Witnesses:

2. I claim the forming of a spring of one J NO. MAJOR, piece of thinplate steel With antagonistic J. M. MAJOR.

[Fmsr PRINrEn 1911.]

